C# Class MpcLib.SecretSharing.BigShamirSharing

Implemenets the threshold secret sharing scheme based on Adi Shamir's method on BigIntegers.

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Public Methods

Method	Description
GenerateCommitment ( int numShares, BigZp coeffs, System.Numerics.BigInteger prime, MG &witnesses, PolyCommit polyCommit ) : MG
Recombine ( IList sharedSecrets, int polyDeg, System.Numerics.BigInteger prime ) : BigZp
Recombine ( IList sharedSecrets, int polyDeg, System.Numerics.BigInteger prime, bool usePrimitiveRecombine ) : BigZp	Recombines (interpolate) the secret from secret shares.
Share ( BigZp secret, int numPlayers, int polyDeg ) : IList	Calculates the shares of a secret with polynomial of degree t and numPlayers players.
Share ( BigZp secret, int numPlayers, int polyDeg, IList &coeffs ) : IList	Calculates the shares of a secret with polynomial of degree t and numPlayers players. The method also returns the array of coefficients of the polynomial.

Private Methods

Method	Description
Share ( BigZp secret, int numPlayers, int polyDeg, bool usePrimitiveShare, IList &coeffs ) : IList	Evaluates the shares of secret with polynomial of degree 'polynomDeg' and 'numPlayers' players.
SimpleRecombine ( IList sharedSecrets, int polyDeg, System.Numerics.BigInteger prime ) : BigZp
TruncateVector ( BigZp vector, int toSize ) : BigZp[]

Method Details

GenerateCommitment() public static method

public static GenerateCommitment ( int numShares, BigZp coeffs, System.Numerics.BigInteger prime, MG &witnesses, PolyCommit polyCommit ) : MG
numShares	int
coeffs	BigZp
prime	System.Numerics.BigInteger
witnesses	MG
polyCommit	PolyCommit
return	MG

Recombine() public static method

public static Recombine ( IList sharedSecrets, int polyDeg, System.Numerics.BigInteger prime ) : BigZp
sharedSecrets	IList
polyDeg	int
prime	System.Numerics.BigInteger
return	BigZp

Recombine() public static method

Recombines (interpolate) the secret from secret shares.

public static Recombine ( IList sharedSecrets, int polyDeg, System.Numerics.BigInteger prime, bool usePrimitiveRecombine ) : BigZp
sharedSecrets	IList
polyDeg	int
prime	System.Numerics.BigInteger
usePrimitiveRecombine	bool
return	BigZp

Share() public static method

Calculates the shares of a secret with polynomial of degree t and numPlayers players.

public static Share ( BigZp secret, int numPlayers, int polyDeg ) : IList
secret	BigZp
numPlayers	int
polyDeg	int
return	IList

Share() public static method

Calculates the shares of a secret with polynomial of degree t and numPlayers players. The method also returns the array of coefficients of the polynomial.

public static Share ( BigZp secret, int numPlayers, int polyDeg, IList &coeffs ) : IList
secret	BigZp
numPlayers	int
polyDeg	int
coeffs	IList
return	IList